ChromeOS: Implement EULA screen of material design OOBE.

chrome/browser/resources/chromeos/login/oobe_screen_eula.css

 /* Copyright 2013 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #eula {
   min-height: 395px;
   padding: 70px 17px 21px;
 }
 
@@ skipping 85 matching lines @@
   width: 100%;
 }
 
 .step.eula-loading #cros-eula-frame {
   display: none;
 }
 
 .step.eula-loading #cros-eula-loading {
   display: -webkit-flex;
 }
+
+#oobe:not([md-mode]) #oobe-poly-eula,
+#oobe:[md-mode] #oobe-eula {
+  visibility: hidden;

[michaelpg, 2016/08/15 16:16:49]

use display: none
also, don't you also do this from JavaScript?

[Alexander Alekseev, 2016/08/15 19:36:43]

This was part of an experiment.
"display: none" will not create elements, and JS initialization will fail. (So I
removed this code.)

+}
+
+#oobe[md-mode] #oobe-poly-eula,
+#oobe:not([md-mode]) #oobe-eula {
+  visibility: visible;

[michaelpg, 2016/08/15 16:16:49]

same comments

+}